'Le Crunch' delivers its 108th instalment when England and France meet at Twickenham on Saturday.

Here, the PA news agency examines five talking points heading into the round four showdown.

Under the pump

How affected have France been by their disrupted build-up? Even they will not know for sure until Saturday when they play their first match in a month. Twelve front line players, including Antoine Dupont and captain Charles Ollivon, tested positive for coronavirus. Apart from the distraction of the investigation into how the outbreak started amid revelations that some players left the squad's bubble in Rome to eat waffles and on the same weekend head coach Fabien Galthie attended a game to watch his son in action, there is the question over what shape the affected personnel will be in. It is an imponderable that will be answered at Twickenham.

Must stop Dupont

If he is fit and firing, then Dupont will be the key to France's hopes of maintaining course for the Grand Slam. The player of the 2020 Six Nations is the irrepressible force at the heart of Les Blues' welcome resurgence who has taken scrum-half play to a new level. Electric running skills that combine pace, power and vision are matched by his generalship and shrewd defence. The 24-year-old is one of Test rugby's smallest players, yet also its most influential on recent form. Jones has outlined the need to "keep him in a little box" – good luck trying.